Hot-air furnace



(Ne Medel.) 1 2 sheets-sheen 11. G. T. FINLBY. 'HOT AIB, FURNAGB.

Ne. 522,36. f Patented Ju1y.3, 1894.

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2 Sheets-Shet 2.

(No Model.)

G. T. PINLEY.

HOT AIR FURNAGE.

10.522,364. I Egt@ 1y 3,1894..l

lowing is a specification.

.u UNITED STATE-s PATENT Omron.

GEORGE T.FINLEn on wEsrNEWToN, PENNSYLVANIA.

. sPEcIFrcArroN ferming part of Letters Patent No. 522,364, dated July e, 1894.

nppneetien sied December 14, 189s. seein No. 493,702'. (ne medei.)

To all whom it may concern:

Be it known that l, GEORGE T. FINLEY, a

citizen of the UnitedStates,`residing at West, Newton, in the county of Westmoreland and State of Pennsylvania, have invented a new and useful Hot-Air Furnace, of which the fol- This invention relates to and it has for its object to providean improved hot air furnace which shall insure the thorough heating of the air beforepassing the same to the places to'be heated, while at the same time effectuallypreventingsmoke, gas, and other products'of combustion from the fires mingling Withsuch air.

, of the present invention is to provide aV jointless lire-box in combination with other spe-l citic features of novelty Iwhich shall complete a furnace securing theresultsclaimed.

With these and other objects in view which will readily appear as the. nature of the invention is better understood,the same consists in the novel construction, combination and arrangement of vparts hereinafter morev fully described, illustratedV and claimed.

In the accompanying drawingsf-V-Figure l is a perspective view,partly broken away, of

a hot airy furnace constructed in accordance with this invention. Fig. 2 isla centralver-k tical longitudinal sectional view thereof. Fig. 3 is a horizontal sectional view on the line oc-w of Fig. 2. Fig.` 4 is a detail in perspec-l tive of one of the horizontal partition plates.

Referring to the accompanying drawings, A represents an inclosing furnace casing forming the inclosing outer walls of the heating devices thereof, and provided at the front with a vertical front 'opening B, extending nearly its entire height, and at one side and the bottom thereof with a coldair opening or inlet C, which provides -for the admission of cold air intoV the interior of the furnace cas-V ing, as will be more particularly referred to.

Built centrally within the inclosing furnace casing A,`and on the bottom thereof is the raised ash vpit wall D.

The raised ash pit wall D, is rectangular in shape corresponding to the shape of the outer inclosing casing A, and is provided with a front opening E,

hot air furnaces;I

communicating with the front opening of said casing, and the upper'edge of the raised ash pit wall D, ,is'provided with an inner shoulder F, adapted to snugly receive the lower edge of the dome-shapedtire box G. The firebox G,'is substantially rectangular in horizontal section tocorrespond with the shape of the outer inclosing casing and the raised yashpitwall D, inside thereof, and as is clearly illustrated-in the drawings, the outer Walls of the raised ash-pit Walland the fire box are disposed sufficiently iny from the inner sidesy l of the inclosing 'casing' A, lto forma hot air space.l H, in'sideef Athe casing, and surrounding the raised ash pit Wall and the fire-box, To this end the main: and primary'obje'ct` thereby providing means for heating up the airadmitted into the casing through the opening C, and' causing itto circulate through the hot air pipes l, leading into the top of the casing, and which carry the heated air to the rooms or other places to be heated.

The dome-shaped fire-box G, is cast in one solidpiece of metal without a single joint, and has projected from the front end thereof the integral extended end flange J, which registers in the vertical front opening B, of

the furnace casing and is disposed in alignmentlwith the front opening E, of the ash pit there-below, and insideV of the projected end harige J,jof the single-piece lire-box is built an' inclinedcoal chute K, which declines toward the interior and bottom of the fire box -to provide means for feeding the fuel onto the grate L. The grate L,is mounted to slide on top of the raised ash pit Wall D, at the bottom of the fire-box, and has connected to one end thereof the shaker bar or rock shaft M, to one end of which is attached the lever N, for operating the bar and shaking the grate to relieve it of the ashes which fall into theash pit there-below.

The inner sides of the lire box G, above the grate are lined with a fire-clay lining O, and the products of combustion escape fromsaid tire box through the smoke I'lue P opening into the closed Ytop thereof, The front fuel opening formed at the frontzupper end'A of `the. projected flange J, of the lire box is inclosed by the door Q, mounted on the front casing plate R, secured to the front wall of the casing over IOG the front opening therein, and the lower end of said front plate R, is provided with a door inclosed opening S, which communicates with the interior of the ash pit.

Now by the construction just described, it will be apparent that it is impossible for smoke, gases and other products of combustion to escape from the re box into the hot air space H, and in this hot air space H, are arranged parallel channel or partition plates T. The parallel channel or partition plates T, are arranged in parallel horizontal planes one above the other. between the bottom cold air opening of the casing and the top thereof, so as to form separate intermediate hot air channels U, which provide a tortuous passage for the air in its circuit around the tirebox. The said channel or partition plates T consist of rectangular strips or plates ot' metal the edges of which fit close up to the inner walls of the casing and the outside of the fire box G, and said strips or plates ot metal are adapted to have one end thereof terminate short of one Wall of the outer casing to form air passages V, which communicate 0r connect the separate channels U--and these passages V, are arranged out of alignment in order to insure the circuitous or tortuous passages of the air, whereby the same will be thoroughly heated before passing out through the hot air pipes I.

Changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is-

In a hot air furnace, the combination of the inclosing casing having a front vertical opening and a bottom cold air opening at one side, a smaller raised ashpit wall arranged Within the casing and provided with an upper shouldered edge, a jointless sin gle-casting dome-shaped fire box arranged within the casing out of contact with its walls and resting at its lower edge on the upper shouldered edge of the ashpit wall, said lire box being provided at one side with an integral projected rectangular end fiange registering in the vertical front opening of the casing and having an inclined coal chute therein, the grate supported to slide on the upper edge of the ashpit wall within the lire-box, and a series of parallel channel or partition plates arranged in parallel horizontal planes one above the other within the casing and snugly fitting the exterior of the fire box, said plates consisting of continuous rectangular plates of metal extended at one end up to one side of the projected end fiange of the fire-box and having their other ends terminating short of the front wall of the casing to form air passages, said air passages being out of alignment, substantially as set forth.

In testimony that I claim the foregoing as my own l have hereto affixed my signaturein the presence of two Witnesses.

GEORGE T. FINLEY.

Witnesses:

ROBERT B. CAMPBELL, D. A. HUNTER. 

